Wall Cleaning

The extensive use of roughcast render and dashing on walls in recent years has led to the development of appropriate Wall Cleaning techniques. Just like a roof surface, dashed and rendered walls require a non-aggressive cleaning method in order to maintain a clean finish without damage to the surface.

The Contamination: Green and red algae die and disperse quickly.The precise identification of the black dots has not been made. They behave like lichen to the treatment and need brushing with soft brushes.

the process

The process consists of wetting the surface first with a lean Softwash solution, followed by brushing with a water fed pole and soft bristle brush.

A short weathering period will cleanse the surfaces of any growth and return it to a like new state. Walls that are some what sheltered from the elements may require a light rinsing a few days after treatment using a tap pressure garden hose.

It is highly recommended that prior to exterior painting the walls surfaces are cleansed thoroughly to remove any contamination and without the use of damaging pressure washers.